^^^ Yes. The car has a lot of subtle color which would look much more interesting in more diffuse light. I wouldn't use fill flash unless it was diffused, and even then, shooting on a less sunny day would be better.
I like the main subject and the angles, but the backgrounds are killing it for me. It’s not that I don’t like the mood set by the locale, it’s the lack of strong separation. In the first photo, those cabins (houses?) are sharp enough and well enough exposed that they almost look like they’re sitting on top of the truck’s roof. This might be just me, but I find that once I notice a “forced perspective” like this in a picture, it’s all I see when I look at it.
Well I do agree that another time of day would help out a lot. If you DO make it back out there, try some of the other angles... see what you get in color and B&W... you got some good feedback here, and these were some decent shots to start with.. so I think you can come away with some really good ones.